Partly crystalline, a-polar thermoplast with crystalinity between 60% and 70%; in many grades it’s available, pure as well as in blends with fill- and/or re-enforcing additives. Polyolefin, available as homo-, block-co- or random-copolymer.

Specific properties
Mass: 0,895 - 0,92 g//cm3
Mechanical properties: Relatively stiff and tough, also at low temperatures, but depending on the crystallinity. Relatively high hardness at low charpy values.
Very suitable for designing film-hinges.

Physiological properties:
PP is odourless and tasteless. It is well used in skin contact applications.

Filler and re-enforcing materials
PP is applied with a lot of filler and re-enforcing materials like chalk, wood dust, glas fiber, long glas fibers, glass balls, carbon black. Specially coated fillers in reaction with additives and mineral fillers increase the scratch resistance of the PP-surface.

Thermal properties
Heat resistant to ca. 110ºC. At 0ºC and lower, the material becomes very brittle. When it burns, it smells like a candle.

The natural colour is milky tranparent to opaque.
Can be colored in almost any colour, opaque as well as translucent; with high surface gloss.

Very well injection mouldable;
When not pre-treated, badly gluable due to the a-polar surface.
Good weldable through different weld techniques; can be bonded to TPE’s (2C injection moulding).

Due to the fact that the properties are more or less adjustable by the crystallinity, this material is used in a wide range of applications.
A few applications it is used in are:
packaging's, (bottles, buckets, films), kitchen tools, interiors of refrigerators and washing machines, housings of all kinds of electrical equipment, toys, car interiors, suitcases, drinking cups. garden furniture, industrial sockets etc.

Polypropylene (cop.)

Young's modulus 1325 MPa
Shear modulus 400 MPa
Tensile strength 34 MPa
Elongation 450 %
Compressive strength 46.5 MPa
Fatigue 24 MPa
Bending strength 41 MPa
Hardness 97.5 Rockwell
Impact strength 0.685 J/cm
Yield strength 0 MPa
Thermal expansion 104 E-6/K
Thermal conductivity 0.17 W/m*K
Specific heat 1963.5 J/kg*K
Vicat 90 °C
Melting temperature 165 °C
Glass temperature -10 °C
Minimum service temperature -10 °C
Maximum service temperature 105 °C
Density 904 kg/m3
Resistivity 1E+21 Ohm*mm2/m
Breakdown potential 57.5 kV/mm
Dielectric loss factor 0.001
Friction coefficient 0.4
Refraction index 1.49
Shrinkage 1.75 %
Water absorption 0.01 %